毕业设计---基于单片机的汽车智能雨刮器设计.doc

基于单片机的汽车智能雨刮器设计 摘 要 PWM的输出语言变量，并以此通过脉宽调制技术来驱动直流电机，使两个雨刮同步摆动。 本文基于单片机完成了对雨滴传感器及模糊控制的软、硬件设计，并对控制系统进行了MATLAB仿真，仿真实验结果表明该系统能有效的抑制超调现象，提高系统的响应速度和稳态性能。 关键词：雨滴传感器；模糊控制；单片机；雨刮器 The Design Of Intelligent Windscreen Wiper Of Automobile Based On Single Integrated Circuit Abstract The windscreen wiper is an accessories of the Automobile, it is an important part of Automobile for the steer security. It is used to clear up the rain and snow, dust and cement on the windscreens,rear windows and headlight windows,to make sure the windows transparent and clear. In this thesis,compositive theory of three kinds of rain sensors are analysed,and a new-type of infrared rain sensor of automobile is designed based on the theory of variety of light intersity.When it rains,the windscreen wiper system senses the amount of rainfall by the infrared rain sensor and distinguish the number of precipitation rain fall and thus makes the windscreen wiper automatically work either at a high speed or at a low speed. It can replace traditional windscreen wiper system of mechanical structure. In intelligent windscreen wiper system of automobile, As the problem of technics,rotate speed of two electro motors are not the same completely,so there are the problems that two wiper blades swing ansynchronous. In the thesis,a intelligent windscreen wiper system of automobile based on fuzzy control is presented,by analyzing fuzzy control theory and synchronous swing rules of windscreen wiper. The speed error and its change were used as fuzzy stable variable.According to a set of fuzzy rules, the output variable was selected to control the PWM switch. In this way, the PWM technique was used to drive the DC motor and control windscreen wiper to swing synchronously. The software and hardware of rain sensors and fuzzy control was completed based on SCM in this thesis,and process the simulation of MATLAB. The simulation results showed that the system could depress the overshoot and improve the response and steady